Hi Trem, I spent a couple of months fiddling with underwater arc for colloidal gold.
The first lesson that I learned was to keep the DW as cold as possible so as to sustain the arc. I used a large pot to hold ice water to keep the brew cell cold. One other person set up a recirculating system with a 250 gallon child's wading pool to cool the recirc. water. I had best results when the arc was abut 1/2" below the water surface. However that required that the gold electrodes were incased in pyres glass so that only about 1/8" of gold was exposed. I also found the by having the tip of an adjustable elctrode strike the other (fixed) electrode on its side, I had better arc control and could adjust the arc with power on. Be careful here on how you insulate the moving electrode as 15 kv gives a nasty bit! I just took a break to measure the CG that I have on the shelf. 1.84 ppm; Cf =37 uS/cm; Very light violet in color 3 ppm; Cf = 12 uS/cm; light violet in color 8-10 ppm (mesogold) Cf =31 uS/cm light redwine color. The 1.84 and the 3 ppm were measured by Lynn Kimball. I guess I need to set up and make some more. I even made a thermoelectric cooler to try on this project. "Ole Bob" -- The silver-list is a moderated forum for discussion of colloidal silver. Instructions for unsubscribing may be found at: http://silverlist.org To post, address your message to: silver-list@eskimo.com Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <mdev...@eskimo.com>
